Automatic locking spindle



Feb. 15, 1949. H T. TORNERG y 2,461,851

AUTOMATIC LOCKING SPINDLE Filed Aug. 30, 1947 Patented Feb. 15, 1949 AUTOMATIC LOCKING SPINDLE Henning T. Tomberg, Ridgewood, N. J., assigner Machinery Corporation, Lodi, N. J., a corporation of Delaware Application August 30, 1947, Serial No. 771,478 1 claim. (ci. 24a-4.6.2)

to Modern Plastic The present invention relates to a spindle for carrying va spool, as for instance in a thread winding machine.

An object o f this invention is to provide a spindle of the character mentioned, of novel and improved construction, whereby a spool thereon is easily secured thereto, or made loose thereon.

Another object hereof is to provide a novel and improved spool-locking device which is permanently associated with the spindle on which the spool is to be mounted and requires no putting on or taking off of parts, to mount or remove the spool.

A further object of this invention is to provide a novel and improved spindle and locking device of the kind described,'which is of simple construction, cheap to manufacture, easy to use and eflicient in carrying out the purposes lfor Which it is designed.

Other objects and advantages will become apparent as this disclosure proceeds.

In the accompanying drawings forming part of this specification, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 shows a spindle embodying the teachings of this invention.

Fig. 2 is an enlarged end view of Fig. 1.

Fig. 3 is a diagrammatic representation forv explaining the mode of operation of the spool lock.

' In the drawings, the numeral I5 designates a spindle member which is preferably a rod, journalled to a frame I6,`by means of collar I1, and the knurled collar I8. A screw I9, of comparatively smaller diameter than said rod stock, extends forwardly coaxially of said spindle member I5, and carries thereon a preferably cylindrically shaped nut member 20, in threaded engagement therewith. The nut member 2Il, and the spindle member I5, are preferably of the same rod stock, but the threaded bore of the nut member is slightly oi center, thereby making said nut member what may be deemed an eccentric or cam, havy ing movement when rotated, along the longitudinal axis line of the spindle I5. An eccentricity of but a few thousandths of an inch is found to be suiiicient in most cases. The nut member 20, has one or more knurled lanes ZI for gripping the wall 22' of the hole of the spool 22. Such knurl 2|, adds to the ec'centricity. The length of the shortest spool used on the spindle, should exceed the length of spindle member I5, and preferably shall be greater than the combined lengths of members l5 and 20. Also, the length of the screw I 9, shall exceed the length of the nut member 20. The ends of the nut member may be rounded.

The size of the hole in the spools used on any particular spindle device, shall be such that the spool 22 can be easily but not loosely slipped on both spindle member I5 and nut member 20, with the nut member at least a bit spaced from the end of the spindle member.

In use, such condition, referring to Fig. 3, shows 22', the wall of the bore in the spool, to be represented by the line X. The spindle is held against rotation in any suitable manner asfor instance holding on to knurled collar I8 by hand. Now the spool 22 is rotated axially, whereupon nut member 20 is caused to move along screw I9, in a direction towards collar I8, and the position of line X, is now at line Y. The spool is firmly gripped to spindle I5.

To releasethe spool, spindle I5 is held against rotation, and the spool turned in the opposite direction. This will cause the nut to move to its initial position, and the spool is unlocked and can be removed from off the spindle. The numeral V2Il indicates the position of the nut member when the spool is gripped tightly. The knurling `2I, aids the grip during` locking movement and at locking position of the spool.

'This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed, as for instance in a display device, the spindle I5 may be stationary. It is therefore intended .and -desired that the embodiment herein be deemed illustrative-and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claim rather Y than to the specic description herein to inditubular member in one direction with respect to the shank, the nut will be moved along said threaded portion towardsl the other portion of the shank and lock said member on the shank, and thereupon some axial rotary movement of such member in the opposite direction with respect to the shank, the nut will be moved away from such other portion of the shank and unlock said member from the shank whereby such member is freed for removal from off the shank and nut, in combination with a frame; said shank being axially rotatably mounted on said frame and extending therefrom with the threaded portion thereof furthest from the frame and means on the shank for manually holding same against axial rotary movement while the tubular member is on the shank.

HENNING T. TORNBERG.

4 REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 806,221 Wardwell Dec. 5, 1905 1,960,227 Krissiep May22, 1934 FOREIGN PATENTS Number Country Date 349,327 Italy June 11, 1937 

